The coexistence of different order parameters and the pairing symmetry is the major issue in the study of iron-based superconductors. We adopt a two-orbital tight-binding model, for the coexistence of superconductivity, Jahn–Teller distortion and antiferromagnetism in $s^{\pm }$-wave symmetry, which is consistent and most favourable for the nearest-neighbour pairing interaction, and derive a set of gap equations which are solved numerically and self-consistently. The effects of the order parameters on one another are studied. We have also calculated the electronic specific heat, density of states and band energies. The specific heat jump at the transition temperatures showing the second order phase transitions is observed and the coefficient of specific heat is also calculated. The density of states shows the defined interference peaks on either side of the Fermi level corresponding to the order parameters with van Hove singularities. The band energies which show the saddle point shift of the bands are also studied.

铁基超导体研究中的主要问题是不同阶参数的共存和配对对称性。对于超导，Jahn-Teller畸变和反铁磁性的共存，我们采用两个轨道的紧束缚模型。$s^{\pm }$对称性最强的波对称性，并推导了一组间隙方程，它们在数值上是自洽的。研究了顺序参数彼此之间的影响。我们还计算了电子比热，态密度和能带。观察到在显示第二阶相变的转变温度下的比热跃变，并且还计算了比热系数。状态密度在费米能级的任一侧上显示了定义的干扰峰，对应于具有van Hove奇点的阶数参数。还研究了显示谱带鞍点位移的谱带能量。